Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-06-19
Phys.Lett.B492:161-170,2000
Physics
High Energy Physics
High Energy Physics - Theory
LaTeX, 13 pages, an example of a non-Einstein spacetime preserving consistency with the flat limit added
Scientific paper
10.1016/S0370-2693(00)01082-0
We investigate the structure of equations of motion and lagrangian constraints in a general theory of massive spin 2 field interacting with external gravity. We demonstrate how consistency with the flat limit can be achieved in a number of specific spacetimes. One such example is an arbitrary static spacetime though equations of motion in this case may lack causal properties. Another example is provided by external gravity fulfilling vacuum Einstein equations with arbitrary cosmological constant. In the latter case there exists one-parameter family of theories describing causal propagation of the correct number of degrees of freedom for the massive spin 2 field in arbitrary dimension. For a specific value of the parameter a gauge invariance with a vector parameter appears, this value is interpreted as massless limit of the theory. Another specific value of the parameter produces gauge invariance with a scalar parameter and this cannot be interpreted as a consistent massive or massless theory.
Buchbinder Ioseph L.
Gitman Dmitri M.
Pershin V. D.
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